<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

         <!-- 卡片视图 -->
         <el-card>
             <!-- 添加角色按钮 -->
             <el-row>
                 <el-col>
                     <el-button type="primary" @click="addDialogVisible=true">添加角色</el-button>
                 </el-col>
             </el-row>
             <!-- 角色列表 -->
             <el-table
                :data="roleslist"
                border
                stripe
                style="width: 100%">
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <!-- 栅格系统布局 -->
                        <el-row :class="['bdbottom',i1 ===0 ? 'bdtop' :'','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span='5'>
                                <el-tag closable @close='removeRightById(scope.row,item1.id)' type="primary">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span='19'>
                                <!-- 渲染二级权限 -->
                                <el-row :class="['bdtop',i2 ===0 ? '':'bdtop','vcenter']" v-for='(item2,i2) in item1.children' :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag closable @close='removeRightById(scope.row,item2.id)' type="success">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag closable @close='removeRightById(scope.row,item3.id)' type="warning" v-for="(item3) in item2.children" :key="item3.id">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column
                    type="index"
                    label="#">
                </el-table-column>
                <el-table-column
                prop="roleName"
                label="角色名称"
                width="180">
                </el-table-column>
                <el-table-column
                prop="roleDesc"
                label="角色描述">
                </el-table-column>
                <el-table-column
                prop="level"
                label="操作">
                    <template slot-scope="scope">
                        <!-- 修改按钮 -->
                        <el-button type="primary" icon="el-icon-edit" size="mini" @click="edit(scope.row.id)">编辑</el-button>
                        <!-- 删除按钮 -->
                        <el-button @click="deleteRoleById(scope.row.id)" type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                        <!-- 分配角色按钮 -->
                        <el-tooltip class="item" effect="dark" content="分配权限" placement="top" :enterable="false">
                                <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                        </el-tooltip>              
                    </template>
                </el-table-column>
            </el-table>
         </el-card>

         <!-- 添加角色的对话框 -->
         <el-dialog @close="addDialogClosed"
            title="添加角色"
            :visible.sync="addDialogVisible"
            width="50%"
            >
            <!-- 内容主体区域 -->
            <span>
                <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
                    <el-form-item label="角色名称" prop="roleName">
                        <el-input v-model="addForm.roleName"></el-input>
                    </el-form-item>
                    <el-form-item label="角色描述" prop="roleDesc">
                        <el-input v-model="addForm.roleDesc"></el-input>
                    </el-form-item>
                </el-form>
            </span>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRole">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改角色的对话框 -->
        <el-dialog @close="eidtDialogClosed"
            title="修改用户信息"
            :visible.sync="eidtDialogVisible"
            width="50%"
            >
        
                <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
                    <el-form-item label="角色名" prop="roleName">
                        <el-input v-model="editForm.roleName"></el-input>
                    </el-form-item>
                    <el-form-item label="角色描述" prop="roleDesc">
                        <el-input v-model="editForm.roleDesc"></el-input>
                    </el-form-item>
                </el-form>
            
            <span slot="footer" class="dialog-footer">
                <el-button @click="eidtDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="eidtRoleInfo">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 分配权限的对话框 -->
        <el-dialog @close="setRightDialogClosed"
            title="分配权限"
            :visible.sync="setRightDialogVisible"
            width="50%"
            >
            <!-- 树形控件 -->
            <el-tree :default-checked-keys='defKeys' 
            show-checkbox :data="rightsList" 
            :props="treeProps" node-key="id" 
            default-expand-all ref="treeRef">
            </el-tree>
            
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRight">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return {
            roleslist:[],
            addDialogVisible:false,
            // 添加角色的表单数据
            addForm:{roleName:'',
            roleDesc:''},
            // 添加表单的验证规则对象
            addFormRules:{
                roleName:[{required:true,message:'请输入角色名',trigger:'blur'}],
                roleDesc:[{required:true,message:'请输入角色描述',trigger:'blur'}]
            },

            // 控制修改角色对话框的显示与隐藏
            eidtDialogVisible:false,

            // 修改角色的表单数据
            editForm:{},
            // 修改角色表单的验证对象
            editFormRules:{
                roleName:[{required:true,message:'请输入角色名',trigger:'blur'}],
                roleDesc:[{required:true,message:'请输入角色描述',trigger:'blur'}]
            },
            setRightDialogVisible:false,
            // 所有权限的数据
            rightsList:[],
            // 树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            // 默认选中的节点id值
            defKeys:[],
            // 当前即将分配权限的id
            roleId:''
        }
    },
    created(){
        this.getRolesList()
    },
    methods:{
        async getRolesList(){
            const {data:res}=await this.$http.get('roles')
            if(res.meta.status!=200){
                return this.$message.error('获取角色列表失败')
            }
            this.roleslist=res.data
        },
        addRole(){
            this.$refs.addFormRef.validate(async valid=>{
                if(!valid){
                    return
                }
                // 可以发起添加用户的请求
                const {data:res}=await this.$http.post('roles',this.addForm)
                if(res.meta.status!=201){
                    this.$message.error('添加用户失败')
                }
                this.$message.success('添加用户成功')
                // 关闭对话框
                this.addDialogVisible=false
                // 重新获取用户列表
                this.getRolesList()
            })
        },
        // 监听添加用户对话框的关闭事件
        addDialogClosed(){
            this.$refs.addFormRef.resetFields()
        },
        // 修改角色功能
        async edit(id){
            this.eidtDialogVisible=true
            const {data:res}=await this.$http.get('roles/'+id);
            if(res.meta.status!==200){
                return this.$message.error('修改角色信息发生错误')
            }
            this.editForm=res.data
        },
        // 监听修改角色对话框关闭事件
        eidtDialogClosed(){
            this.$refs.editFormRef.resetFields()
        },
        // 修改表单信息的预验证
        eidtRoleInfo(){
            this.$refs.editFormRef.validate(async valid=>{
                if(!valid){
                    console.log('表单信息预验证不通过');
                }
                const {data:res}=await this.$http.put('roles/'+this.editForm.roleId,{roleName:this.editForm.roleName,roleDesc:this.editForm.roleDesc})
                if(res.meta.status!==200){
                    return this.$message.error('提交修改角色信息发生错误')
                }
                // 首先关闭表单
                this.eidtDialogVisible=false
                // 重新渲染页面
                this.getRolesList()
                // 提交成功信息
                this.$message.success('提交修改角色信息成功')
            })
        },
        // 删除表单信息按钮触发事件
        async deleteRoleById(id){
            const confirmRsult=await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err=>err)
            if(confirmRsult!=='confirm'){
                return this.$message.info('已取消删除')
            }
            console.log('确认删除');
            const {data:res}=await this.$http.delete('roles/'+id)
                if(res.meta.status!==200){
                    return this.$message.error('删除用户信息发生错误')
                }
                // 重新渲染页面
                this.getRolesList()
                // 提交成功信息
                this.$message.success('删除用户成功')
        },
        // 根据id删除对应的权限
        async removeRightById(role,rightId){
            // 弹框提示用户是否要删除
            const confirmRsult=await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err=>err)
            if(confirmRsult!='confirm'){
                return this.$message.info('取消了删除')
            }
            const {data:res}=await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
                if(res.meta.status!==200){
                    return this.$message.error('删除权限失败')
                }
                // 这里不建议重新渲染页面 会导致页面合上
                role.children=res.data
                // 提交成功信息
                this.$message.success('删除权限成功')
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role){
            this.roleId=role.id
            // 获取所有权限的数据
            const {data:res}=await this.$http.get('rights/tree')
            if(res.meta.status!==200){
                this.$message.error('获取权限失败')
            }
            // 获取到的权限的数据保存在llist中
            this.rightsList=res.data
            console.log(this.rightsList);

            // 递归获取三级节点的id
            this.getLeafKeys(role,this.defKeys)
            this.setRightDialogVisible=true
        },
        // 通过递归的形式获取角色下所有三级权限的id
        getLeafKeys(node,arr){
            if(!node.children){
                // 如果当前node节点不包含children属性 则是三级节点
                return arr.push(node.id)
            }
            node.children.forEach(item => {
                this.getLeafKeys(item,arr)
            });
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys=[];
        },
        // 点击为角色分配权限
        async allotRight(){
            const keys=[...this.$refs.treeRef.getCheckedKeys(),...this.$refs.treeRef.getHalfCheckedKeys()];
            const idStr=keys.join(',')
            const {data:res}=await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
            if(res.meta.status!==200){
                return this.$message.error('分配权限失败')
            }
            this.$message.success('分配权限成功')
            this.getRolesList()
            this.setRightDialogVisible=false
        }
    }
}
</script>

<style lang="less" scoped>
    .el-tag{
        margin: 7px;
    }

    .bdtop {
        border-top: 1px solid #eee;
    }

    .bdbottom {
        border-bottom: 1px solid #eee ;
    }
    .vcenter {
        display: flex;
        align-items: center;
    }
</style>